I just find it weird that with such a low literacy rate, a kid would get her hands on a book.
Books should also be ridiculously expensive in that world due to the low literacy rate, price of the materials, and the act of transcribing them, doubly so if its a picturebook, since the drawings would also have to be drawn by hand for each copy.
If it was just a series of pictures on wood tablets, that seems more like the kind of thing that would be done for that. Story without words on a cheap material.